diff --git a/examples/scd4x_simpletest.py b/examples/scd4x_simpletest.py
index c4f035d..62b071a 100644
--- a/examples/scd4x_simpletest.py
+++ b/examples/scd4x_simpletest.py
@@ -5,7 +5,8 @@
 import board
 import adafruit_scd4x
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 scd4x = adafruit_scd4x.SCD4X(i2c)
 print("Serial number:", [hex(i) for i in scd4x.serial_number])
 
diff --git a/examples/scd4x_tuning_knobs.py b/examples/scd4x_tuning_knobs.py
index cb2495c..9c6e90b 100644
--- a/examples/scd4x_tuning_knobs.py
+++ b/examples/scd4x_tuning_knobs.py
@@ -5,7 +5,8 @@
 import board
 import adafruit_scd4x
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 scd4x = adafruit_scd4x.SCD4X(i2c)
 print("Serial number:", [hex(i) for i in scd4x.serial_number])